xpitxbullx
Flashlight Enthusiast
A friend asked me to build a flashlight for him. I'm making a 3 x XPG @1000ma max per LED in a 2D maglight with multiple levels of brightness.
Here's the problem, I have a extra 2D-8AA batter carrier to keep the cost down. I want it so he can use regular alkaline batteries or rechargeables and 8 batteries instead of 6 for better runtime.
If he uses rechargeables, that's 11.2V off the charger. It won't be long before a buck circuit drops out of regulation. I want him to have decent sustained max brightness. Not just for 30 minutes before dropping brightness. Alkaline batteries can't sustain the load for long but make a nice emergency option.
A boost circuit will fry the LED's if he uses alkies or hot off the charger rechargeables.
Is there a nice buck/boost driver out there with variable brightness? I've looked but didn't see any.
Worst case scenario, I have to use a 2D-6AA setup (solder a wire into the 8AA battery carrier. I just prefer it if I can use 8AA.
Thanks,
Jeff
Here's the problem, I have a extra 2D-8AA batter carrier to keep the cost down. I want it so he can use regular alkaline batteries or rechargeables and 8 batteries instead of 6 for better runtime.
If he uses rechargeables, that's 11.2V off the charger. It won't be long before a buck circuit drops out of regulation. I want him to have decent sustained max brightness. Not just for 30 minutes before dropping brightness. Alkaline batteries can't sustain the load for long but make a nice emergency option.
A boost circuit will fry the LED's if he uses alkies or hot off the charger rechargeables.
Is there a nice buck/boost driver out there with variable brightness? I've looked but didn't see any.
Worst case scenario, I have to use a 2D-6AA setup (solder a wire into the 8AA battery carrier. I just prefer it if I can use 8AA.
Thanks,
Jeff